Materials Literature
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Silica-coated vesicles have been produced by the deposition of silica onto unilamellar vesicles from aqueous solution for the first time. The quaternary ammonium surface of the surfactant vesicles is receptive to silica and facilitates deposition of up to 5–10 nm of it. The “petrified” vesicles are stable to dehydrati…
Very long crystalline CdS nanowires (see Figure) are fabricated here via a polymer-controlled growth approach that involves distribution of Cd2+ ions in a polyacrylamide matrix followed by treatment with thiourea. It is shown that the polyacrylamide plays an important role in controlling the diameter and increasing th…
The incorporation of pozzolanic materials in the manufacturing of blended cement has a positive effect on the improvement of blended mortar and concretes performances. These active additions modify porous structure, impeding or delaying the access of aggressive solutions and, therefore materials more durable are possi…
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Infrared thermography is a very versatile non destructive technique which among other uses, can be applied to the study of moisture in buildings. However, this particular application can present some problems strictly related to the characteristics of the thermocamera device. In this case the available equipment works…
An exhaustive diagnosis of "anatomy, physiology and pathology" of the masonry body of the leaning Tower of Pisa has been carried out with the aim of integrate the knowledge of the structure features, mechanical conditions and decay processes of the building materials, necessary for correctly managing the therapy, temp…
In the present work, the behaviour of alkaline cement mortars reinforced with fibres of different nature (acrylic and polypropylene fibres) is studied. Also the chemical stability of those fibres in strong alkaline medium has been investigated. Three different matrixes have been used: glass blast furnace slag activate…
Composites of nickel and Al 2 O 3 with compositionally graded microstructures were fabricated from powders through an empirically determined thermal‐behavior‐matching process that was designed to minimize processing‐induced stresses. Compositions ranged from pure Al 2 O 3 to pure nickel. Specimen geometries included r…
The question of the equilibrium linear charge density on a charged straight conducting “wire” of finite length as its cross-sectional dimension becomes vanishingly small relative to the length is revisited in our didactic presentation. We first consider the wire as the limit of a prolate spheroidal conductor with semi…